IEA SHC Task 61/EBC Annex 77: Integrated Solutions for Daylighting and Electric Lighting

Lighting accounts for 19% of the global electric energy consumption, and major savings can be achieved by intelligently connecting daylighting, electric lighting and control systems. At the same time, optimal visual and non-visual conditions must be provided for the user. Within this project the user requirements for lighting solutions and existing and novel control systems will be analyzed and documented. For evaluation purposes a consistent scheme for the characterization of daylight systems and an hourly rating model for integrated solutions will be worked out. Using a monitoring protocol, implemented integral lighting solutions will be evaluated in lab and field studies.

Short Description

This new task of the International Energy Agency (IEA) focuses on the identification of the potentialities of strategies combining daylighting, electric lighting and appropriate lighting control systems to lead to both 

  • very high energy-efficient lighting schemes, and also to
  • solutions offering the best lighting conditions for humans.

During 3½ years this IEA Task will bring together over 30 experts and companies from 15 countries involved in dynamic daylighting, electric lighting solutions, and lighting controls. The scope of the Task is on general lighting systems for indoor environments. The focus is laid on lighting appliances in non-domestic buildings. Technically, the Task deals with the integration of

  • daylight utilization by enhanced façade technologies and other architectural solutions,
  • electric lighting scenarios addressing technology and design strategies, and
  • lighting control systems and strategies with special focus on visual and non-visual user needs and special emphasis on the interface of day- and electric lighting.

The aim of the IEA Task is to foster the integration of daylighting, electric lighting and integrated control solutions to provide highest energy efficiency and optimal conditions for the user. (c) Bartenbach GmbH

User requirements for integrated lighting solutions will be gathered, taking into account both visual and non-visual requirements. The results will be aggregated into typical user and temporal profiles, so called "personas". The state of the art in lighting control systems will be surveyed and new developments analyzed and evaluated for future potentials. A widely accepted scheme for the characterization of daylighting systems is still missing. A major task will be to collect existing approaches and to assemble a consistent proposal. Although this is standard in many other building trades, an hourly based evaluation and rating model for lighting systems is not available yet. Such a method, including daylighting, electric lighting and controls shall be worked out. To evaluate the performance of integrated solutions, a monitoring protocol will be defined and applied in selected lab and field studies.

The results will be publicly available in reports and online resources, part of the work (the daylight system characterization and the hourly rating model) will lead to deliverables which will be forwarded as standardization proposals, in relation to ISO, CEN or CIE.


Austria, Belgium, Brazil, China, Denmark, Germany, Italy, Japan, Netherlands, Norway, Singapore, Slovakia, Sweden, Switzerland, USA

Contact Address

Project lead:

Bartenbach GmbH
Dr. David Geisler-Moroder
Rinner Str. 14, 6071 Aldrans

Project partner:

Hella Sonnen- und Wetterschutztechnik GmbH
Mag. Robert Weitlaner, MSc.
A-9913 Abfaltersbach 125